This is my first time posting on this forum so please message me as soon as you can for any corrections to make.

To Reproduce
Steps to reproduce the crash:

1. Place any gun on the gun modification table. Some guns may crash the game automatically when placed in the gun modification box.
2. Place in any gun attachment
3. Game starts to freeze and shut down.

Screenshots

N/A
Versions (please complete the following information):

• Forge: Forge 14.23.5.2768
• Flan's Mod: 5.5.2 (Minecraft version 1.12.2)

Additional context

Crash Report:
crash-2019-05-11_23.11.58-client.txt

UPDATE: The issue has been solved. Just had to update to the beta release version. However, if there is any other source to this issue, please comment.